Alarm.



C. A. BRACONIER.

ALARM.

APPLICATION FILED JUNE 9.19m.

Patented J an. 29, 1918.

2 F i, //L/// WW/fill '\\\\\\\\\\\\UlIII/l/l/l///////////// 814m: nioz clamped. @mcoyien CLARENCE A. BRACONIER, 0F WAYNE, MICHIGAN.

ALARM.

Specification of Letters Latent.

Patented Jan.29,1918.

Application filed June 9, 1917. Serial No. 178,739.

To all whom it may concern:

Be it known that I, CLARENCE A. BnAoo- NIER, a citizen of the United States of America, residing at Wayne, in the county of Wayne and State of Michigan, have invented certain new and useful Improvements 1n Alarms, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to a combined thermal and electric alarm that may be advantageously used as an automatic fire alarm, a heat alarm for brooders and indicators, and at such places where it is desired that a predetermined temperature will cause the operation of an audible signal.

Considering the thermal feature of my alarm, I provide a suitable receptacle for a liquid susceptible to expansion by heat and the expansion of the liquid is adapted to elevate a lunger and establish an electric circuit. IOVlSlOIl is made in connection With the receptacle so that an excessive expansion of the liquid therein will not burst or destro the receptacle, thus allowing the alarm mechanism to be again used if not destroyed by fire.

Considering the electrical feature of the alarm, there are adjustable contact members in circuit with a suitable source of electrical energy and an audible signal, such as an electric bell, and the contact members are disposed so that they may be adjusted and used either in connection with a device requiring a closed circuit to operate the same, or a device having a normally closed circuit that must be open in order to operate the dev1ce.

From a structural standpoint, the alarm consists of a comparatively few parts that are inexpensive to manufacture, easy to assemble and highly efficient for the purpose for which they are intended.

My invention will be hereinafter specifieally described and then claimed, and reference will now be had to the drawings, wherein,

Figure 1 is a side elevation of the alarm mechanism, partly broken away, and partly in section; and

Fig. 2 is a front elevation of the same.

In the drawing, 1 denotes a ceilin or other support provided with a conventlonal form of electric bell 2 or other audible signal. The support 1, contiguous to the bell 2 has an L shaped hanger 3 and the lateral Y mally resting on the surface of the liquid 7 is a piston 8 having a concentric tubular stem 9 extending through an opening or guide 10 of the lateral portion 4 of the hanger 3. In the tubular stem 9 there is a plunger 11 and interposed between the inner end of said plunger and the piston 8 is a coiled release or cushion spring 12.

The side wall of the c linder or receptacle 6 is provided with ac eck valve body 13.

and a portion 14 communicating therewith. The check valve body 13 has an apertured cap 15, a ball check valve 17, and a coiled compression spring 16 holding the ball check valve normally seated to close the port 14 of the c linder 6. The port 14 is in proximity to t e upper end of the cylinder 6 and should the piston 8 be elevated above the port 14, by an excessive expansion of the liquid 7, then the liquid will unseat the ball check valve 17 and preclude burstin of the cylinder or receptacle. The Intern portion 4 of the hanger 3 has a vent 18 in communication with the cylinder 6 so that the piston 8 may be elevated therein.

Connecting the outer end of the lateral portion 4 and the vertical portion of the hanger 3 is a slotted segment member 19 and adjustable in the slot 20 of said member are contact members 21 and 22.

The hanger 3, adjacent the lateral portion 4 thereof, is provlded with an apertured boss 24 and extending through said boss and suitably insulated therefrom is a binding post 25. The inner end of the binding post 25 has apertured lugs .26 and pivotally mounted between said lugs by a transverse pin 27 is a bifurcated member having contact arms 28 and 29. The contact arm 28 is straight and is adapted to engage the contact member 22, while the contact arm 29 is adapted to engage the contact member 21.

The lateral portion 4 of the hanger 3 is provided with an insulated adjustable screw 30 connected by a coiled retractile spring 31 to an apertured ear 32 of the bifurcated lull pivoted member, so that the contact arm 29 of said member Will be held normally in engagement with the contact member 21 of the segment member 19.

A suitable source of electrical energy, as a battery 33 is connected by a Wire 3% to the binding post 25 and by a Wire 35 to the electric bell 2. The electric bell is C0111 nected by the Wire 36 to the contact member 23. The electric bell 2 is therefore in a normally open circuit and should the plunger 11 be raised by the piston 8 and the expansive force of the liquid '7 Within the cylinder 6, the upper end of the plunger ll Will engage the arm 29 and elevate the bifurcated member until the arm 28 engages the contact member 22 and closes the circuit, causing the electric bell 2 to sound, Should there be an excessive expansion of liquid '2' Within the cylinder 6, the coiled spring 12 Will allow the piston 6 to continue its upward movement, after the plunger ll engages the arm 29, and until such time that the valve 17 is open.

Wires 37 and 38, the former connected to the source or electrical energy, and the latter to the contact member 21 show that the alarm may be used in connection With a device including a normally closed circuit, and when the circuit is broken by the arm 29 moving out of engagement With the contact member 21, then such device is adapted to be operated by the broken circuit,

It is thought that the operation. and utility of the alarm Will be apparent Without further description, and While in the drawing there is illustrated a preferred embodiment of my invention, it is to be understood that the structural elementsare susceptible to such variations and modifications as fall Within the scope of the appended claims,

What I claim is: 1. In a float operated circuit closer, a hanger, a segment member carried thereby,

adjustable contact members carried by said lidtill

bifurcated member, a spring interposed between said plunger and said piston, and a relief valve in proximity to the upper end of said cylinder.

2., In a float operated circuit closer, a hanger, a slotted segment member carried by said hanger, adjustable contact members carried by said segment member and adapted for open and closed circuits, a pivoted bifurcated member carried by said hanger, means carried by said hanger maintaining said member normally in engagement with one of said contact members, a cylinder carried by said hanger adapted to contain an expansive liquid, and a yieldable plunger in said cylinder adapted to be elevated by the expansive force of said liquid to raise the bifurcated member to engage the other of said contact members,

In testimony whereof I an ix my signature in the presence of two Witnesses,

CLAl ENCE A, lWitnesses WM. Horton, P. J 

